Manufacturing technology for copper-clad aluminum composite busbar

Abstract

The invention discloses a manufacturing technology for a copper-clad aluminum composite busbar, and belongs to the technical field of metal processing. The manufacturing technology solves the problem that by means of an existing manufacturing technology for a copper-clad aluminum composite busbar, the copper and aluminum bonding strength is low, the uniformity of a copper plating layer is poor, and a copper layer is too thick. According to the manufacturing technology for the copper-clad aluminum composite busbar, a continuous passing type induction heating furnace is used for conducting high-temperature induction heating on a copper-clad aluminum pipe blank, the heating temperature ranges from 600 DEG C to 900 DEG C, and the heating time ranges from 30s to 300s. A molten aluminum film in a semi-molten state or semi-solid state is formed on the outer surface of an aluminum bar, the inside of the aluminum bar and a copper pipe keep solid, hot forging and pressing with the single-stroke reduction ratio being equal to or smaller than 40% is conducted on the heated copper-clad aluminum pipe blank, the molten aluminum film is diffused and permeated into the copper pipe, and a copper and aluminum atom composite layer is formed. Accordingly, the bonding strength of copper and aluminum is improved.

Description

【Technical field】 [0001] The invention relates to a preparation process of a copper-clad aluminum composite bus bar, belonging to the technical field of metal processing. 【Background technique】 [0002] Copper-clad aluminum composite busbar is a new type of bimetal composite conductor, which has the advantages of good electrical conductivity, low density and low price. It can replace the existing pure copper conductive busbar and can be widely used in building power distribution busway, high school Frequency heating equipment, various control cabinets and large busbars in the field of metallurgy and chemical industry, etc. [0003] In the existing copper-clad aluminum production methods, such as casting method, horizontal continuous casting method, extrusion method, hydrostatic extrusion method, sleeve drawing method, cladding welding method and rolling crimping method, it is difficult to prepare the cross-sectional size High-performance copper-aluminum composite busbar wit...

AI Technical Summary

Problems solved by technology

[0007] In the existing copper-clad aluminum composite busbar production technology given above, the metallurgical bonding performance between the copper and aluminum interfaces is often not ideal, and there are still low copper-aluminum bonding strengths, poor uniformity of the clad copper layer, Excessive thickness of the copper layer and other problems lead to the mechanical performance and economical efficiency of the copper-clad aluminum composite busbar products cannot meet the actual needs